WM8904_SYSCLK_SRC
WM8904_SYSCLK_SRC, 0);
clock2 &= ~WM8904_SYSCLK_SRC;
clock2 |= WM8904_SYSCLK_SRC;
WM8904_CLK_SYS_ENA | WM8904_SYSCLK_SRC, clock2);